Elizabeth Betsy Braddock is a fictional superhero appearing in American comic books published by Marvel Comics, commonly in association with Captain Britain and the X-Men. Created by writer Chris Claremont and artist Herb Trimpe in 1976, she first appeared in the Marvel UK series Captain Britain.

Betsy Braddock was initially a supporting character in the adventures of her twin brother, Brian Braddock, as the original Captain Britain, before temporarily becoming the superheroine Captain Britain herself and later joining the X-Men in 1986 as Psylocke, a codename coined by the villains Mojo and Spiral.[2] Originally presented as a precognitive in the pages of Captain Britain and then as a telepath, she was later established to be a mutant, developing telekinesis as well as martial arts skills, the latter of which derived from a body swap with the Japanese mutant ninja Kwannon lasting nearly 30 years of publication history. She and Kwannon were returned to their original bodies in a 2018 story, after which, Betsy permanently took up the mantle of Captain Britain, while Kwannon adopted the Psylocke identity.